Sharpener for edge-tools



(No Model.)

H. L. JOHNSON. SHARPENBR FOR EDGE TOOLS.

No. 435,697. Patented Sept. 2, 1890.

UNITED STATES PATENT OFFICE.

HENRY L. JOHNSON, OF READING, PENNSYLVANIA.

SHARPEN ER FOR EDGE-TOOLS.

SPECIFICATION forming part of Letters Patent No. 435,697, datedSeptember 2, 1890.

Application filed April 24, 1890. Serial No. M9324. (No model.)

To all whom it may concern.-

Be it known that I, HENRY L. JOHNSON, a citizen of the United States,residing at Reading, in the county of Berks, State of Pennsylvania, haveinvented certain Improvements in Sharpeners for Edge-Tools, of which thefollowing is a specification.

Hy invention relates to certain improvements upon the form of kn ife-sharpener shown in my previous patent, No. 386,544, issued July 24,1888.

The main objects of these improvements is to especially adapt thesharpener for scissors or similar tools.

The invention is set forth in a preferred form in the accompanyingdrawings, and in the following description.

Figure I is a side elevation, and Fig. 2 a rear elevation, of myimproved sharpener.

The main portion or standard G of my device is provided with suitablemeans, as clamping-jaws F and set-screws f, for securing it to aconvenient support. The upper end of the standard G forms a jaw or openframe B, with vertical faces I) and I) on either side of an opening 12These faces are preferably cut like a fine file, or provided with somesuitable sharpening medium. The movable portion II of the device ispivoted at a point D to the standard G, and is provided with a handle Eand a jaw A, uniting wit-h the portion H in the rear of the fixed jaw Band passing in a forward direction through the opening b in the latter.The jaw A is provided with a sharpening medium, as stone 0, which may beadj ustably secured thereto by means of set-screws a and a.

As represented, it will be observed that my sharpener is adapted moreespecially for sharpening such tools as seissor-blades, one of which isrepresented in position by the dotted portion K.

In operating the device the flat portion of the blade K is pressedagainst the faces I) and Z) of the fixed jaw and the shearing-edgesimultaneously pressed downward against the face of the sharpeningmedium O, which latter may be swung inward through the opening b by apressure upon the handle E at the same time that the blade is movedacross it, thus constantly changing the points of contact. Thesharpening-surface c of the medium 0 being arranged to form a curve fromthe center D, its angle of intersection with the blades 1) and b willnot vary at any point of its movement, and the angle of theshearing-edge will thus he kept uniform though its line of contact withthe stone is constantly changing.

I do not desire to limit' myself to the exact construction shown, asthis may evidently be somewhat modified; but

lVhat I claim is 1. In atool-sharpener, the combination, with a fixedjaw having an opening, as D of a pivoted jaw or member A, adapted to beswung through said opening, substantially as set forth.

2. In a sharpener for edge-tools, the combination, with a part G,provided with a clamping mechanism and havinga fixed jaw B, with openingb and vertical faces I) and b, of a jaw A, pivoted to the part G andprovided with a sharpening medium 0, adapted to be swungthrough saidopening b substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY L. JOHNSON.

\Vitnesses:

E1). A. KELLY, F. PIERCE HUMMEL.

